Sound-amplifying horn



July 17, 1928.

Jesse WQ/Hendricks Ju1y17,192s. 1,617,182

J. C. HENDRICKS SOUND AMPLIFYING HORN Filed July 2o, 1927 5 sneetssheet 2 INVENTOR WITNESS: WW- l A-rToRNEY July 17, 192s. 1,677,782'

J. C. HENDRICKS SOUND AMPLIFYING HORN Filed July 20, 1927 3 Sheets-Sheet 3 I if@ 5. f//

Jesse ady Hendr//s INVENTOR I WITNESW ATTORNEY Patented July 127, 1928.

Uni'rED STATES JESSE CODYUHiENDRICKS, OF GREENSBURG, AlSl'DlfAIQ'A.

SOUND-AMPLIFYING- HORN,

Application filed July 20,

This invention relates to sound amplifying devices and has for an object therprovision offa loud speaker horn which is capable of use with radio receiving apparatus and other sound reproducing apparatus or nisms.

The primary object ofthe present invention is to'provide a sound amplifying horn which will include a relatively long sound l0 passage of true exponential proportions arranged in compact form for cabinet installation, the sound passage being constricted at each change of thickness of panel so as to maintain a true exponential passage.

Another object of the invention isto provide a horn which includes a mainV outlet chamber and communicating sound passages arranged at the sides, top, bottom and rear, to form a continuous sound passage which communicates with the sound outlet chainber, the side, top, bottom and rear passages at their points of communication being constricted so as to maintain proper cross sectional area. Y

lVith the above and other objects in view, the invention further includes the following novel features and details of construction, to be hereinafter more fully described, illus- 30 trated in the accompanying 'drawings and pointed out iii the appended claims.

In the drawings Figure 1 is a perspective view of the invention.

Figures 2, 3, 1, 5 and 6 ai'e sectional views taken substantially on the lines 2-2, 3-3, P-1l, 5-5 and G--fl of Figure 1.

Referring to the drawings in detail Wherein like characters of reference denote corresponding parts, the amplifier is shown as comprising a casing having a bottom wall 10, a top wall 11, side walls 12 and a rear Wall 13. The casing thus formed provides main or sound outlet chamber 14 which opens at the front of the casing.

Arranged within the top Wall 11 is an upper horizontal sound passa-ge 15 having a sound entrance opening 16 at one end thereof to receive the sound from a suitable reproducer unit. The passage 15 is shaped as shown so as to provide a passage of an appreciable length within a restricted space and the opposite walls of the passage are of the same length so.as to provide a passage of true exponential proportions. The inner end of the passage 15 communicates with ya the rear wall 13.`

1927. semaine. 207322,23.

vertically disposed passage 17 provided in y The passage 17 extends downward and its upper end is restricted as shown at 18`s'o'ftlia't the increase inc ciossf` sectional area lofthe passage y.may be in true exponential conformity. 'The lower endloff. the passage` 17 co'miiiunicates; witli a `low horizontally disposed passage 19 which is:V

also constricted at its entrance end as shown at 20. rlhe opposite end of the passage 19 is formed with. separate laterally extending branch passages 21. TheseI passages 21 open into vertically and rearwardly extending passages 22 provided in the side walls 12 and these last mentioned passages open into the sound outlet chamber 14 at the rear of said chamber as indicated at 23. The outer walls of the passages 22. are rounded as shownat 24 and are extended at their meeting points as shown at 25, so that the sound passing out of the passages 22 is deflected in the directionotl the open end of the sound outlet chamber. Y Y

The invention is susceptible of various changes in its form, proportions and minor details of construction and the right is herein reserved to make such changes as properly fall within the scope of the appended claims. Y

Having described the invention what is claimed is 1. A sound amplifier comprising a casing including top, bottoni, side and end Walls defining a sound outlet chamber open at the front of the casing, said casing having a sound inlet opening, sound passages arranged in the top, bottom, side and end walls of the casing and communicating with one another to provide a continuous sound passage from the sound inlet opening to the sound outlet chamber.

2. A sound amplifier comprising a casing including top, bottom, side and end walls defining a sound outlet chamber open at the front of the casing, said casing having a sound inlet opening, sound passages arranged in the top, bottom, side and end walls of the casing and communicating with one another to provide a continuous sound passage f'rom the sound inlet opening to the sound outlet chamber having outer exponential proportions.

3. A sound amplifier comprising a casing `including top, bottom, side and end walls defining a sound outlet chamber open at the front of the casing, said casing having a sound inlet opening, sound passages arranged in the top, bottoni, side and end walls of the casing and communicating with one another to provide a continuous sound passage from the sound inlet opening to the sound outlet ehainber having outer exponential proportions and the width of the passage being eonstrieted at each Change in direetion of travel of the sound.

4.o A sound amplifier comprising a easing including top, bottoni, side and end walls defining a sound outlet ehainber open at the front of the easing, said easing having` a sound inlet opening at its top wall and a sound passage extending from said opening horizontally through said wall, a vertically tallyV disposed passage provided in the bottoni wall and having its rear end communieating withthe lower end of the rear wall passage and its forward end forming separate laterally extending branch passages and side wall passages having one oi' their ends communicating with the branch passages and their other ends ,Communicating with the sound outlet Chamber at the rear portion thereof.

In testimonT whereof I aiix iny signature.

.inssn eoDY HENDRroKs. 

